全文获取类型
收费全文 | 20218篇 |
免费 | 1145篇 |
国内免费 | 184篇 |
专业分类
耳鼻咽喉 | 133篇 |
儿科学 | 1169篇 |
妇产科学 | 295篇 |
基础医学 | 2462篇 |
口腔科学 | 350篇 |
临床医学 | 1219篇 |
内科学 | 3452篇 |
皮肤病学 | 396篇 |
神经病学 | 1299篇 |
特种医学 | 694篇 |
外国民族医学 | 5篇 |
外科学 | 2775篇 |
综合类 | 796篇 |
一般理论 | 1篇 |
预防医学 | 1414篇 |
眼科学 | 1072篇 |
药学 | 2025篇 |
5篇 | |
中国医学 | 307篇 |
肿瘤学 | 1678篇 |
出版年
2023年 | 107篇 |
2022年 | 269篇 |
2021年 | 407篇 |
2020年 | 276篇 |
2019年 | 301篇 |
2018年 | 366篇 |
2017年 | 294篇 |
2016年 | 363篇 |
2015年 | 411篇 |
2014年 | 592篇 |
2013年 | 775篇 |
2012年 | 1111篇 |
2011年 | 1131篇 |
2010年 | 665篇 |
2009年 | 541篇 |
2008年 | 931篇 |
2007年 | 946篇 |
2006年 | 881篇 |
2005年 | 840篇 |
2004年 | 754篇 |
2003年 | 757篇 |
2002年 | 706篇 |
2001年 | 617篇 |
2000年 | 635篇 |
1999年 | 569篇 |
1998年 | 244篇 |
1997年 | 222篇 |
1996年 | 195篇 |
1995年 | 184篇 |
1994年 | 145篇 |
1993年 | 153篇 |
1992年 | 361篇 |
1991年 | 387篇 |
1990年 | 347篇 |
1989年 | 389篇 |
1988年 | 293篇 |
1987年 | 306篇 |
1986年 | 244篇 |
1985年 | 268篇 |
1984年 | 231篇 |
1983年 | 206篇 |
1982年 | 128篇 |
1981年 | 115篇 |
1979年 | 187篇 |
1978年 | 123篇 |
1975年 | 134篇 |
1974年 | 143篇 |
1973年 | 136篇 |
1972年 | 123篇 |
1971年 | 142篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
Detection of hydatid antigen in urine by countercurrent immunoelectrophoresis. 总被引:4,自引:0,他引:4
下载免费PDF全文
![点击此处可从《Journal of clinical microbiology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hydatid antigen was demonstrated for the first time in the urine of patients with hydatid disease by countercurrent immunoelectrophoresis (CIEP). The antigen was detected in the concentrated urine of 7 of 16 (43.75% positive) patients with surgically confirmed hydatid disease, 4 of 10 (40% positive) patients with ultrasound-proven hydatid disease (daughter cysts or prominent septation and hydatid sands demonstrated by ultrasound), and 8 of 14 (57.14% positive) patients with clinically diagnosed (presumptive) hydatid disease. No antigen was detected in the concentrated urine from 24 patients with parasitic diseases other than hydatid disease. However, antigen was detected in 2 (8% false positive) of 25 concentrated urine samples collected from healthy control subjects (blood donors and students). These result suggest that the detection of hydatid antigen in the urine by CIEP is a simple, rapid, and noninvasive method of diagnosis of hydatid disease. 相似文献
102.
P L Tisdale B D Collier H M Kauffman M B Adams A T Isitman R S Hellman R G Hoffmann S A Rao T Joestgen L Krohn 《Journal of nuclear medicine》1986,27(8):1266-1272
A prospective evaluation of 111In-labeled platelet scintigraphy (IPS) for the early diagnosis of acute postoperative renal transplant rejection (TR) was undertaken. The results of IPS were compared with in vitro biochemical tests, the clinical finding of graft tenderness, and combined [99mTc]DTPA and [131I]orthoiodohippurate scintigraphy. With a sensitivity of 0.93 and a specificity of 0.95, IPS provided otherwise unavailable diagnostic information. Furthermore, postoperative IPS was a good predictor of long-term allograft survival. 相似文献
103.
104.
105.
When splenic nonenhancement is seen at computed tomography, one should look for signs of vascular pedicle injury; if injury to the vascular pedicle is not present, nonenhancement of the spleen could be secondary to severe vasoconstriction and may be considered an additional sign of the hypoperfusion complex. The presence of splenic nonenhancement may also help differentiate the hypoperfusion complex from other types of bowel injury. 相似文献
106.
本文应用HRP顺、逆行追踪法结合免疫细胞化学双重标记法,对大鼠孤束核向伏核的投射进行了研究。主要结果如下:1.WGA-HRP注入孤束核尾侧段,在伏核后部的腹、内侧区,出现较密集的标记纤维、终末和标记细胞;将HRP注入伏核后部的腹、内侧区,在孤束核尾侧段(主要在连合核和内侧亚核)出现大量的顺、逆行标记,以同侧为主。2.HRP注射到伏核并结合免疫细胞化学反应,在孤束核尾侧段发现HRP-TH,HRP-NT、HRP-CCK双重标记细胞。HRP-TH的数目最多,其次是HRP-NT双标细胞,HRP-CCK双标细胞最少。 相似文献
107.
Infection continues to be a major complication of the use of indwelling venous catheters. In an attempt to avoid removal of the catheter and to minimize the systemic side-effects of antibiotics, the potential value of in-situ treatment of confirmed Broviac catheter infection was assessed in carefully selected patients attending an oncology unit. Fourteen episodes from 11 children were included in the study. A variety of organisms were encountered. Infective episodes were divided into two categories: (a) those occurring in patients with negative peripheral blood cultures and neutrophil count greater than 1.5 x 10(9) l-1 which were treated only by local instillation of heparinized antibiotic 8-hourly for 7-14 days (N = 8); (b) those occurring simultaneously with positive peripheral blood culture (or peripheral blood culture not performed) regardless of neutrophil count, or infection restricted to Broviac catheter but with a neutrophil count of less than 1.5 x 10(9) l-1; these were treated, with one exception, as above with the addition of systemic antibiotics (N = 6). Treatment was successful in 100% of infective episodes with negative cultures achieved between 5 and 12 days. Catheters remained in use a mean of 118 days following treatment of infection. This approach has obvious advantages but requires careful patient selection and monitoring. It prolongs the catheter life, obviates the need for systemic antibiotics for a local infection, and with appropriate instruction to parents and family practitioner, treatment may be administered on an outpatient basis. 相似文献
108.
本文报道23例颈椎病手术患者采用1%普鲁卡因与2%利多卡因混合液局麻加静脉哌替啶强化取得满意的效果。文中围绕呼吸管理问题对前、后手术入路的麻醉用药、输血、补液及头部固定等注意事项均作了具体介绍。 相似文献
109.
BACKGROUND: Acquired Brown syndrome is known to occur after trauma, iatrogenic events, cysts of superior oblique muscle tendon, and inflammation. The purpose of this study is to report a large series of patients with acquired Brown syndrome secondary to superior oblique muscle cysticercosis and to discuss its management. METHODS: Retrospective analysis was performed of clinical and imaging features, management, and outcome in seven patients with cysticercosis of the superior oblique muscle presenting clinically as Brown syndrome. RESULTS: Seven patients were identified (five male and two female) ranging in age from 6 to 45 years. All patients had the ocular motility limitation, ie, limitation of elevation in adduction., characteristic of Brown syndrome. This was associated with pain and swelling in the superior nasal orbit. Diagnosis was established by observing the cysticercus cyst with scolex on imaging (ultrasound B scan, magnetic resonance imaging, and/or computed tomography). Oral albendazole (15 mg/kg) and oral prednisolone (1mg/kg) were given for 4 weeks, and the patients were followed up for 1 year. Clinical recovery with improvement of ocular motility and regression of imaging features was noted in all patients. CONCLUSIONS: Acquired Brown syndrome secondary to superior oblique muscle cysticercosis is a rare entity. Awareness of this condition, which leads to early diagnosis and institution of prompt medical treatment, results in a successful clinical outcome. 相似文献
110.